/Engine/Source/Runtime/Core/Public/Math/Rotator.h
Modify if necessary the passed in rotator to be the closest rotator to it based upon it's equivalent. This Rotator should be within (-180, 180], usually just constructed from a Matrix or a Quaternion.
void SetClosestToMe ( [TRotator](API\Runtime\Core\Math\TRotator) & MakeClosest ) const